Observations of L1157-B1 and L1157-mm were carried out during several runs between September 2012 and March 2015 as part of the Large Program ASAI [1]}. The source nominal positions are \(\alpha _{J 2000} =\)  20\(^{\text{h}}\)  39\(^{\text{m}}\)  10.\(^{\text{s}}\) 2
\(\delta _{J 2000} =\)  +68\(^{\circ }\)  01\(^{\prime }\)  10\(^{\prime \prime }\)  for L1157-B1 and \(\alpha _{J 2000} =\)  20\(^{\text{h}}\)  39\(^{\text{m}}\)  06.\(^{\text{s}}\) 3 \(\delta _{J 2000} =\)  +68\(^{\circ }\)  02\(^{\prime }\)  15.8\(^{\prime \prime }\)  for L1157-mm.
We made use of the broad-band EMIR receivers connected to Fast Fourier Transform Spectrometers in the 200 kHz spectral resolution mode.
